干化污泥对盐碱土土壤性能及植物生长的影响

Effect of dry sludge application on saline-alkali soil property and the growth of plants

研究了干燥后的污泥对盐碱土土壤理化性质及污染的影响,并在此基础上设置了盆栽试验,以观察不同泥土比中植物的生长情况。结果表明:干化污泥既能为作物生长提供有效养分,又能明显地提高土壤肥力。虽然施用污泥后土壤中的全盐量增加,但对所选取植物的生长影响较小;当泥土配比低于一定的比例时,污泥中的重金属不会对土壤造成污染。因此,在盐碱土壤中严格按照标准并合理控制干化污泥的用量可作为解决污泥问题的途径之一。

The effect of the dried sludge on the physicochemical properties and pollution of saline-alkali soil was studied. Based on this, a series of pot experiments were set up to observe the growth of plants in different sludge-tosoil proportions. The results showed that the dried sludge can not only provide effective nutrients for crop growth,but also can significantly improve soil fertility. Although the salt content in the soil increased after the application of sludge, it had less effect on plant growth. When the ratio of sludge to soil was lower than a certain value, the heavy metals in the sludge would not pollute the soil. Therefore, it should be one of the important ways for solving the sludge problem to strictly follow the standards and reasonably control the amount of dried sludge in saline soil.